Barium hydroxide octahydrate, with the CAS number 12230 - 71 - 6, is a white crystalline solid. Its chemical formula is Ba(OH)₂·8H₂O. This compound has a molar mass of approximately 315.46 g/mol. It is highly soluble in water, and the aqueous solution is strongly alkaline. Barium hydroxide octahydrate has a melting point around 78 °C. It is typically produced through the reaction of barium sulfide with sodium hydroxide or by the reaction of barium carbonate with hydrochloric acid followed by the addition of sodium hydroxide. Our factory offers this product at a low price, ensuring high - quality supply for various industrial and laboratory needs.
1. **Chemical Industry**: In the chemical synthesis process, barium hydroxide octahydrate is used as a strong base. It can participate in neutralization reactions, such as reacting with acids to form salts and water. For example, it can react with sulfuric acid to produce barium sulfate, which is an important chemical raw material.
2. **Petroleum Industry**: It is used in the refining of petroleum products. Barium hydroxide octahydrate can remove acidic impurities in petroleum, improving the quality and stability of the products.
3. **Paper Industry**: In papermaking, it can be used as a pH regulator in the pulp - making process, helping to adjust the alkalinity of the pulp and improving the quality of the paper.
1. **Handling Precautions**: When handling barium hydroxide octahydrate, appropriate personal protective equipment should be worn, including gloves, goggles, and a lab coat. Avoid direct contact with the skin, eyes, and clothing. In case of contact, immediately rinse with plenty of water and seek medical attention if necessary.
2. **Dissolving in Water**: If you need to prepare an aqueous solution of barium hydroxide octahydrate, slowly add the solid to the water while stirring continuously. Do not add water to the solid, as this may cause splashing due to the exothermic nature of the dissolution process.
3. **Reaction Conditions**: When using it in chemical reactions, pay attention to the reaction temperature, pressure, and reaction time. Different reactions may require different reaction conditions to ensure the reaction proceeds smoothly.
1. **Case 1: Chemical Synthesis in the Laboratory**
In a laboratory setting, a chemist needed to synthesize a particular barium - containing salt. The chemist added barium hydroxide octahydrate to a solution of a specific acid drop - by - drop under controlled temperature conditions. The reaction was exothermic, so the chemist monitored the temperature closely. After the reaction was complete, the resulting salt was separated and purified through filtration and crystallization processes. The high solubility of barium hydroxide octahydrate in water made it easy to dissolve and react with the acid, ensuring the success of the synthesis.
2. **Case 2: Petroleum Refining**
A petroleum refinery was facing the problem of high acid content in its crude oil. They decided to use barium hydroxide octahydrate to neutralize the acidic impurities. The refinery workers prepared an aqueous solution of barium hydroxide octahydrate and mixed it with the crude oil in a large - scale mixing tank. After a certain period of mixing, the acidic impurities in the crude oil reacted with the barium hydroxide octahydrate, forming insoluble salts that could be easily separated. As a result, the acid value of the refined petroleum decreased significantly, meeting the quality requirements.
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